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crypto: scompress - initialize per-CPU variables on each CPU

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commit 8c3fffe3993b06dd1955a79bd2f0f3b143d259b3 upstream.

In commit 71052dcf4be70 ("crypto: scompress - Use per-CPU struct instead
multiple variables") I accidentally initialized multiple times the memory on a
random CPU. I should have initialize the memory on every CPU like it has
been done earlier. I didn't notice this because the scheduler didn't
move the task to another CPU.
Guenter managed to do that and the code crashed as expected.

Allocate / free per-CPU memory on each CPU.

Fixes: 71052dcf4be70 ("crypto: scompress - Use per-CPU struct instead multiple variables")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit a132ff91717c28498c602e62824f0684a02c8832)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
This commit is contained in:
Sebastian Andrzej Siewior 2019-04-12 17:14:15 +02:00 committed by Vegard Nossum
parent 1b29cdadfd
commit be892379d0
1 changed files with 2 additions and 2 deletions
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4
crypto/scompress.c
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@ -79,7 +79,7 @@ static void crypto_scomp_free_scratches(void)
int i;
for_each_possible_cpu(i) {
scratch = raw_cpu_ptr(&scomp_scratch);
scratch = per_cpu_ptr(&scomp_scratch, i);
vfree(scratch->src);
vfree(scratch->dst);
@ -96,7 +96,7 @@ static int crypto_scomp_alloc_scratches(void)
for_each_possible_cpu(i) {
void *mem;
scratch = raw_cpu_ptr(&scomp_scratch);
scratch = per_cpu_ptr(&scomp_scratch, i);
mem = vmalloc_node(SCOMP_SCRATCH_SIZE, cpu_to_node(i));
if (!mem)